A mask can be black.Logical formLearned from92 sentences. A male may wear an (oxygen mask).Logical formLearned from89 sentences. A mask may be removed.Logical formLearned from88 sentences. Masks may undergo wearings.Logical formLearned from88 sentences. Persons may wear masks.Logical formLearned from87 sentences. Men may wear masks.Logical formLearned from86 sentences. Masks may pertain-to a US-president.Logical formLearned from85 sentences. Masks can be ceremonial.Logical formLearned from83 sentences. A mask can be metallic.Logical formLearned from83 sentences. A (gas mask) may pertain-to a person.Logical formLearned from81 sentences. A mask can be hollow.Logical formLearned from77 sentences. Masks may undergo a collection.Logical formLearned from76 sentences. A person may wear masks.Logical formLearned from74 sentences. An (oxygen mask) can be for a week of a life.Logical formLearned from73 sentences. Some persons may wear masks.Logical formLearned from73 sentences.